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These 'autofocus' glasses could soon make bifocals obsolete – by tracking your eyes in real time
Eye-tracking lenses could mean the end of bifocals
Squinting to see a sign, tilting your head to look at someone, peering down your nose to read a menu: for millions of far-sighted people, glasses are a constant compromise. This data is then fed back to liquid crystal lenses, which can rapidly change their curvature to give perfect focus. Still, the promise is compelling: a single, adaptive pair of glasses that can replace reading specs, distance lenses and bifocals.
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